Audiophilepure

https://www.whathifi.com/amazon/music-unlimited/review

Amazon refers to HD tracks as having a ”bit depth of 16-bits, a minimum sample rate of 44.1 kHz (also referred to as CD-quality), and an average bitrate of 850 kbps.” UHD tracks, on the other hand, “have a bit depth of 24-bits, sample rates ranging from 44.1 kHz up to 192 kHz, and an average bitrate of 3730 kbps.”

To Amazon’s credit, it pushes Ultra HD content extremely hard on the service with dedicated playlists and clear labelling, eg Best of Ultra HD, Ultra HD: New Arrivals, Ultra HD Hip-Hop and Ultra HD Jazz. It doesn’t take long to find a steady stream of UHD music to listen to.

Click on the bright yellow HD or Ultra HD logos that accompany each track (on either desktop or mobile) and you are shown the sample rate of what you are playing together with the playback capabilities of your machine. The desktop app will even prompt you to change the audio settings on your computer to take advantage of the improved audio quality. It’s a clever and thoughtful touch, especially if you want to connect an external DAC that can handle all the available sample rates natively and make the most of Amazon’s hi-res library.

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